This could be an airleak after the airflow meter, any air dragged in here isn t seen by the ECU and in view of that not compensated for and can lean the engine out and can afterward permit the engine to rev happening bearing in mind not desired causing rough running. As its a mechanical idiosyncrasy it tends not to slope on the anomaly open and you can sometimes listen a hissing noise subsequent to the engine running.
I bought it in July, drove it house from LA (to Utah), and the problems started snappishly after I got it home.Any other urge on you can have the funds for is appreciated. I don't know what else to get but believe it back up to the dealer. I know I've got the shop foreman functioning upon it at the dealer, but I nevertheless environment its pushed to the urge on as its old and everyone loses in this situation.
in imitation of I begin the car, the engine surges occurring amid 1200 and 2000 rpm help and forth. I distorted the IAC and the TPS considering no bend in symptoms. I have noticed that several Lexus SC's have this same issue. Prior to this I would have to adapt the idle quickness screw to subjugate the rpm and it would sustain for a while. Now, the engine is for ever and a day surging to the point where I cannot steer it for frighten of damage to the steer train. Any experienced solution?